Quick Release Heel Grounder :  
1-  "Quick release" by using a snap on the stretch material across the foot for a better fit, it's easy to adjust the size by pulling the stretch material. 
2-  Conductive rubber with anti-slip texture. Rubber Strap:Outer surface:10e3-10e4 Ω 
3-  Added safety with 1Mega or 2 Mega ohm resistor. 
4-  Grey conductive ribbon resistance:10e3-10e4 Ω